Clear fish pond moss available gypsum slurry
Fish pond moss consumes oxygen in fish pond water, which hinders fish growth. To remove this kind of moss in the pond, the usual method is to use one millionth of the copper sulphate solution to pour the whole pond. However, if the measurement of copper sulfate is inaccurate, if the amount is small, the effect of removing moss will not be achieved, and if the amount is too large, it will cause fish poisoning and death.
Therefore, pouring with a copper sulfate solution is difficult to master. The use of gypsum slurry to clear fish pond moss is not only effective but also safe for fish.
Use gypsum slurry to clear fish pond moss:
Each mu of fish pond surface, with food-grade plaster 5 kg, add water to prepare a slurry, pouring water to the Quanchi, and the lake more than appropriate places to pour more. After two days of pouring, the moss in the fish pond will disappear and will not regenerate in a short time.
Venlo structure is a popular one at present. This architecture uses horizontal girder as main bearer, forming a stable structure with columns. There is consolidation between horizontal girder and column, and hinge is used to connect column and foundation.
In Venlo greenhouse, foundation is made of reinforced concrete and the side wall is made of brick or reinforced concrete plate. The steel frame always use hot dip galvanized light steel. Roof beam adopts horizontal girder structure and using herringbone connection. The horizontal girder bears 2 or more roofs, which is made of aluminum alloy. This material is used as roof structure material and also glass inlay material. Other beams using gutter style to minimize the section. Delighting material of the roof and side wall using the hollow double-layer or multilayer PC board.
PC board is mainly made of PC/PET/PMMA/PP materials, it need sun screen coating to resist ultraviolet resist and ageing, and it is also required to be anti condensation and antidrug.
As a kind of light material, use PC board can greatly reduce the weight of greenhouse structure, and corresponding reduced the size of the steel frame, which saving the cost of steel.
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JIANGSU SKYPLAN GREENHOUSE TECHNOLOGY CO.,LTD , https://www.greenhousehydroponic.com